When scanning the vehicle with an Autel scan tool, I am able to communicate with all vehicle computers except the PCM. I have checked all circuits and everything checks out, except the following:
1. Ignition does not recognize that there is a key in it, even though one is in, and is turned to start position for data acquisition. I have had a couple instances where the key is identified in the ignition, but doesn't change the communications. Also, the message screen does not seem to care what key is used, as I have experimented with other similar vehicle keys and do not get the "wrong key" error message. While in the Central Gateway 'Live Data' screen, it shows no key in ignition, as well as the sentry key was not active, or not present.
2. While testing circuits I found that the
OFF/RUN/
START
CONTROL
OUTPUT
Circuit was incorrect according to the manual's schematics. The manual shows a pk/wt wire leaving the TIPM via pin 49 in the C1 block, goes through pin 7 in the C130 connector, then ending at the PCM C2 plug pin 29. When continuity testing this wire goes to pin 69 on the PCM C2 plug.
3: While continuity testing the TIPM circuit from pin 26 in block C2, it correctly runs to pin 1 in the PCM C2 plug but also feeds signal to the pin 29 mentioned in the above #2 condition.
How can I get comms established with the PCM?
Can you provide pinout images for the PCM C2 plug and the C130 connector please?
1. Ignition does not recognize that there is a key in it, even though one is in, and is turned to start position for data acquisition. I have had a couple instances where the key is identified in the ignition, but doesn't change the communications. Also, the message screen does not seem to care what key is used, as I have experimented with other similar vehicle keys and do not get the "wrong key" error message. While in the Central Gateway 'Live Data' screen, it shows no key in ignition, as well as the sentry key was not active, or not present.
2. While testing circuits I found that the
OFF/RUN/
START
CONTROL
OUTPUT
Circuit was incorrect according to the manual's schematics. The manual shows a pk/wt wire leaving the TIPM via pin 49 in the C1 block, goes through pin 7 in the C130 connector, then ending at the PCM C2 plug pin 29. When continuity testing this wire goes to pin 69 on the PCM C2 plug.
3: While continuity testing the TIPM circuit from pin 26 in block C2, it correctly runs to pin 1 in the PCM C2 plug but also feeds signal to the pin 29 mentioned in the above #2 condition.
How can I get comms established with the PCM?
Can you provide pinout images for the PCM C2 plug and the C130 connector please?
Jan 27, 2025 at 3:28 PM
